1. Chapter 7: The Control of Microbial Growth
Rate of Microbial Death
Physical Methods
Chemical Methods
Chemical Agents
Terminology
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FINAL ROUND

2. Topic 1: Terminology $100 Question
The removal or destruction of ALL forms of microbial life is called
sterilization.
disinfection.
pasteurization.
sanitization.
Answer = A
ANSWER
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3. Topic 1: Terminology $100 Answer
The removal or destruction of ALL forms of microbial life is called
sterilization.
disinfection.
pasteurization.
sanitization.
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4. Topic 1: Terminology $200 Question
The destruction of vegetative pathogens is called
sanitization.
commercial sterilization.
disinfection.
antisepsis.
Answer = C
ANSWER
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5. Topic 1: Terminology $200 Answer
The destruction of vegetative pathogens is called
sanitization.
commercial sterilization.
disinfection.
antisepsis.
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6. Topic 1: Terminology $300 Question
What treatment is intended to lower microbial counts on eating and drinking utensils to safe public health levels?
sanitization
sterilization
pasteurization
antisepsis
Answer = A
ANSWER
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7. Topic 1: Terminology $300 Answer
What treatment is intended to lower microbial counts on eating and drinking utensils to safe public health levels?
sanitization
sterilization
pasteurization
antisepsis
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8. Topic 1: Terminology $400 Question
The absence of significant contamination is called
sepsis.
bacteriostasis.
asepsis.
antisepsis.
Answer = C
ANSWER
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9. Topic 1: Terminology $400 Answer
The absence of significant contamination is called
sepsis.
bacteriostasis.
asepsis.
antisepsis.
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10. Topic 1: Terminology $500 Question
Commercial sterilization is a limited heat treatment to destroy
Streptococcus pyogenes.
Clostridium tetani.
Staphylococcus aureus.
Clostridium botulinum endospores.
Answer = D
ANSWER
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11. Topic 1: Terminology $500 Answer
Commercial sterilization is a limited heat
treatment to destroy
Streptococcus pyogenes.
Clostridium tetani.
Staphylococcus aureus.
Clostridium botulinum endospores.
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12. Topic 2: Rate of Microbial Death $100 Question
Which of the following BEST describes the pattern of microbial death?
The cells in a population die at a constant rate.
All the cells in a culture die at once.
Not all of the cells in a culture are killed.
The pattern varies, depending on the species.
Answer = A
ANSWER
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13. Topic 2: Rate of Microbial Death $100 Answer
Which of the following BEST describes the pattern of microbial death?
The cells in a population die at a constant rate.
All the cells in a culture die at once.
Not all of the cells in a culture are killed.
The pattern varies, depending on the species.
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14. Topic 2: Rate of Microbial Death $200 Question
The time it takes to kill a microbial population is
dependent on heat.
proportional to the number of microbes.
dependent on life cycle phases.
dependent on chemicals.
Answer = B
ANSWER
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15. Topic 2: Rate of Microbial Death $200 Answer
The time it takes to kill a microbial population is
dependent on heat.
proportional to the number of microbes.
dependent on life cycle phases.
dependent on chemicals.
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16. Topic 2: Rate of Microbial Death $300 Question
Damage to which structure causes cellular
components to leak into the surrounding medium?
cell wall
plasma membrane
cytoplasm
glycocalyx
Answer = B
ANSWER
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17. Topic 2: Rate of Microbial Death $300 Answer
Damage to which structure causes cellular
components to leak into the surrounding
medium?
cell wall
plasma membrane
cytoplasm
glycocalyx
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18. Topic 2: Rate of Microbial Death $400 Question
Which of the following types of bond are NOT important in maintaining the shape of proteins?
peptide bonds
hydrogen bonds
disulfide bonds
covalent bonds
Answer = A
ANSWER
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19. Topic 2: Rate of Microbial Death $400 Answer
Which of the following types of bond are NOT important in maintaining the shape of proteins?
peptide bonds
hydrogen bonds
disulfide bonds
covalent bonds
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20. Topic 2: Rate of Microbial Death $500 Question
Which of the following is NOT a factor that influences the effectiveness of antimicrobial treatments?
microbial characteristics
number of microbes
time of day
presence of a biofilm
Answer = C
ANSWER
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21. Topic 2: Rate of Microbial Death $500 Answer
Which of the following is NOT a factor that influences the effectiveness of antimicrobial treatments?
microbial characteristics
number of microbes
time of day
presence of a biofilm
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22. Topic 3: Physical Methods $100 Question
To sterilize heat-labile solutions, one should use
dry heat.
an autoclave.
membrane filtration.
pasteurization.
Answer = C
ANSWER
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23. Topic 3: Physical Methods $100 Answer
To sterilize heat-labile solutions, one should use
dry heat.
an autoclave.
membrane filtration.
pasteurization.
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24. Topic 3: Physical Methods $200 Question
Which method kills microorganisms primarily by the coagulation of proteins (denaturation)?
filtration
radiation
desiccation
moist heat
Answer = D
ANSWER
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25. Topic 3: Physical Methods $200 Answer
Which method kills microorganisms primarily by the coagulation of proteins (denaturation)?
filtration
radiation
desiccation
moist heat
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26. Topic 3: Physical Methods $300 Question
The phosphatase test is used to determine whether which one of the following processes was carried out correctly?
radiation
filtration
desiccation
pasteurization
Answer = D
ANSWER
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27. Topic 3: Physical Methods $300 Answer
The phosphatase test is used to determine whether which one of the following processes was carried out correctly?
radiation
filtration
desiccation
pasteurization
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28. Topic 3: Physical Methods $400 Question
Flaming is one of the simplest methods of
pasteurization.
dry heat sterilization.
moist heat.
desiccation.
Answer = B
ANSWER
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29. Topic 3: Physical Methods $400 Answer
Flaming is one of the simplest methods of
pasteurization.
dry heat sterilization.
moist heat.
desiccation.
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30. Topic 3: Physical Methods $500 Question
The lowest temperature at which all of the microorganisms in a particular liquid suspension will be killed in 10 minutes is called
thermal death point.
thermal death time.
decimal reduction time.
decimal reduction point.
Answer = A
ANSWER
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31. Topic 3: Physical Methods $500 Answer
The lowest temperature at which all of the microorganisms in a particular liquid suspension will be killed in 10 minutes is called
thermal death point.
thermal death time.
decimal reduction time.
decimal reduction point.
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32. Topic 4: Chemical Methods $100 Question
Sterilization can be achieved by using
alcohol.
soap.
chlorine.
ethylene oxide.
Answer = D
ANSWER
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33. Topic 4: Chemical Methods $100 Answer
Sterilization can be achieved by using
alcohol.
soap.
chlorine.
ethylene oxide.
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34. Topic 4: Chemical Methods $200 Question
Which method of evaluating disinfectants is the currently used standard?
use-dilution test
use-diffusion test
disk-dilution test
disk-diffusion test
Answer = A
ANSWER
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35. Topic 4: Chemical Methods $200 Answer
Which method of evaluating disinfectants is the currently used standard?
use-dilution test
use-diffusion test
disk-dilution test
disk-diffusion test
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36. Topic 4: Chemical Methods $300 Question
Which of the following is used on environmental surfaces, instruments, skin surfaces, and mucous membranes?
nitrites
ozone
phenolics
ethylene oxide
Answer = C
ANSWER
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37. Topic 4: Chemical Methods $300 Answer
Which of the following is used on environmental surfaces, instruments, skin surfaces, and mucous membranes?
nitrites
ozone
phenolics
ethylene oxide
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38. Topic 4: Chemical Methods $400 Question
Ethanol can be used as an effective bactericide when used at a concentration of
70%.
50%.
40%.
100%.
Answer = A
ANSWER
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39. Topic 4: Chemical Methods $400 Answer
Ethanol can be used as an effective
bactericide when used at a concentration of
70%.
50%.
40%.
100%.
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40. Topic 4: Chemical Methods $500 Question
Which of the following is NOT used to preserve foods?
sulfur dioxide
sodium nitrite
potassium sorbate
biguanides
Answer = D
ANSWER
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41. Topic 4: Chemical Methods $500 Answer
Which of the following is NOT used to preserve foods?
sulfur dioxide
sodium nitrite
potassium sorbate
biguanides
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42. Topic 5: Chemical Agents $100 Question
Which of the following is the MOST useful for disinfecting medical instruments?
quats
chlorine
phenol
benzoic acid
Answer = A
ANSWER
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43. Topic 5: Chemical Agents $100 Answer
Which of the following is the MOST useful for disinfecting medical instruments?
quats
chlorine
phenol
benzoic acid
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44. Topic 5: Chemical Agents $200 Question
Which of the following is/are used to mechanically remove microbes through scrubbing?
alcohol
biguanides
detergents
quats
Answer = C
ANSWER
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45. Topic 5: Chemical Agents $200 Answer
Which of the following is/are used to mechanically remove microbes through scrubbing?
alcohol
biguanides
detergents
quats
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46. Topic 5: Chemical Agents $300 Question
Which chemical agents cause a disruption of the plasma membrane and denaturation of enzymes?
phenolics
biguanides
heavy metals
halogens
Answer = A
ANSWER
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47. Topic 5: Chemical Agents $300 Answer
Which chemical agents cause a disruption of the plasma membrane and denaturation of enzymes?
phenolics
biguanides
heavy metals
halogens
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48. Topic 5: Chemical Agents $400 Question
Which agents cause denaturation of enzymes and other essential proteins?
aldehydes
heavy metals
peroxygens
nitrates
Answer = B
ANSWER
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49. Topic 5: Chemical Agents $400 Answer
Which agents cause denaturation of enzymes and other essential proteins?
aldehydes
heavy metals
peroxygens
nitrates
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50. Topic 5: Chemical Agents $500 Question
What chemical is used to prevent molds from growing in cheese and soft drinks?
sorbic acid
calcium propionate
sulfur dioxide
sodium nitrate
Answer = A
ANSWER
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51. Topic 5: Chemical Agents $500 Answer
What chemical is used to prevent molds from growing in cheese and soft drinks?
sorbic acid
calcium propionate
sulfur dioxide
sodium nitrate
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52. FINAL ROUND Question
What chemical selectively inhibits certain iron-containing enzymes of Clostridium botulinum?
sodium benzoate
sodium nitrate
sodium nitrite
calcium propionate
Answer = C
ANSWER
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53. FINAL ROUND Answer
What chemical selectively inhibits certain iron-containing enzymes of Clostridium botulinum?
sodium benzoate
sodium nitrate
sodium nitrite
calcium propionate
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